My fifth wheel has a 15,000 BTU A/C and that fine when we are hooked up to shore power. Currently, I have a 2000w generator and that won't do it for that A/C. Has anyone tried one of the portable floor model A/C that are around 5,000 BTU and built for cooling one room? They have a hose that connects to a window for letting the hot air out. You can get them at Home Depot for around $300 dollars.

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TurboKool
Operates with a solar panel and/or on a standard 12-volt system
Amp draw: High: 4.6 amps Med: 3.2 amps Low: 2.2 amps
Maintenance FREE (only one moving part)
Temperature reduction is usually between 20 - 30 degrees
No generator or 110v power needed to run TurboKOOL
Fits all standard 14" x 14" roof vent openings
Unit can also be used as an exhaust fan

The Turbokool would be great for the few times I camp when it is over 90°. Most of the times I go, the high is going to be 85° or lower. I open all the windows and crank up the fantastic fan if it gets too warm inside. Where I camp, it cools off fast once the sun goes down.

My fifth wheel has a 15,000 BTU A/C and that fine when we are hooked up to shore power. Currently, I have a 2000w generator and that won't do it for that A/C. Has anyone tried one of the portable floor model A/C that are around 5,000 BTU and built for cooling one room? They have a hose that connects to a window for letting the hot air out. You can get them at Home Depot for around $300 dollars.

We have not used these in the 5th wheel but I have had occasions to use them at work if we lose an A/C unit on one of our computer rooms.

The units themselves work quite well for our application. Not sure of the amp draw. Not excessively noisy. Just make sure your generator can handle the start up amperage of the unit without a voltage drop.

My fifth wheel has a 15,000 BTU A/C and that fine when we are hooked up to shore power. Currently, I have a 2000w generator and that won't do it for that A/C. Has anyone tried one of the portable floor model A/C that are around 5,000 BTU and built for cooling one room? They have a hose that connects to a window for letting the hot air out. You can get them at Home Depot for around $300 dollars.

The portables are less efficient than window mount units, but a 5K unit still should be less than 600 running watts. If the store has a decent return policy (Most HD items are 90 days), buy it and try it. If there is a setting that allows you to run the fan only (without the compressor), you can start up on fan only, then a few seconds later switch to full cooling. That means you don't get the surge of both the fan motor and compressor starting at the same time, which will put less of a load on your genny.

The 2000 watt generator should run the 15k AC just fine. 2000 watts at 115VAC is around 17 amps of power. The 15k unit should need around 12 amp to start and around 7-9 amps once running. If your generator is having trouble with one AC perhaps it's not actually generating what it's rated at?

Are you running anything else, like battery charger? 2000W shold be sufficient. With hat said, you would want to make sure the AC has a hard start capacitor and delay timer so it can't restart within 5 minutes of turning off.